Abstract: The paper describes the hardware and software modules of System 250, a multi-processor, multi-user system designed for reliable real-time operation.
D. H. ENGLAND - System Design Manager
Plessey Telecommunications Research, Taplow Court.
13 pages with 14 figures:
Typical Hardware Configuration
Capabilities
Load Capability
Capability Structure
Capability Network
Broad Structure of Operating System
Examples of Commands
Multiple Wait For
Software Channelling
IO Serial Medium Handler
Common Facilities Block
A Resource & Its Interface
Symbol Table
Typical User Directory Structure
The Plessey System 250 was an early British computer system designed for real time high reliability applications.
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